/**
 * WisdomEnglish Home Page Styles
 * 
 * 섹션별 스타일링:
 * - Hero, Topics Grid, Featured Topics
 * - Great Books, About, Newsletter
 * 
 * Design Tokens:
 * - Max width: 1200px
 * - Card radius: 16px
 * - Section padding: 80px (desktop), 48px (mobile)
 */

/* ========== Design Tokens ========== */

:root {
    --we-max-width: 1200px;
    --we-section-padding: 80px;
    --we-section-padding-mobile: 48px;
    --we-card-radius: 16px;
    --we-card-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
    --we-card-shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.08);

    /* Colors */
    --we-bg-light: #faf9f7;
    --we-bg-warm: #f5f3ef;
    --we-bg-white: #ffffff;
    --we-text-primary: #1e293b;
    --we-text-secondary: #64748b;
    --we-text-muted: #94a3b8;
    --we-accent-primary: #3b82f6;
    --we-accent-secondary: #8b5cf6;
    --we-border: #e2e8f0;

    /* Level Colors */
    --we-level-a1: #10b981;
    --we-level-a1-bg: #d1fae5;
    --we-level-a2: #f59e0b;
    --we-level-a2-bg: #fef3c7;
    --we-level-b1: #3b82f6;
    --we-level-b1-bg: #dbeafe;
    --we-level-b2: #8b5cf6;
    --we-level-b2-bg: #ede9fe;
}

/* ========== Base Layout ========== */

.we-home {
    background: var(--we-bg-light);
}

.we-section {
    padding: var(--we-section-padding) 0;
}

.we-container {
    max-width: var(--we-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.we-container--narrow {
    max-width: 800px;
}

.we-section__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--we-text-primary);
    margin: 0 0 0.5rem;
    text-align: center;
}

.we-section__subtitle {
    font-size: 1.125rem;
    color: var(--we-text-secondary);
    margin: 0 0 2.5rem;
    text-align: center;
}

.we-section__footer {
    text-align: center;
    margin-top: 2.5rem;
}

/* ========== Grid System ========== */

.we-grid {
    display: grid;
    gap: 1.5rem;
}

.we-grid--3cols {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
    .we-grid--3cols {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .we-grid--3cols {
        grid-template-columns: 1fr;
    }
}

/* ========== Buttons ========== */

.we-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.we-btn--primary {
    background: linear-gradient(135deg, var(--we-accent-primary), var(--we-accent-secondary));
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.we-btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.we-btn--secondary {
    background: transparent;
    color: var(--we-text-primary);
    border: 2px solid var(--we-border);
}

.we-btn--secondary:hover {
    border-color: var(--we-accent-primary);
    color: var(--we-accent-primary);
}

.we-btn--outline {
    background: var(--we-bg-white);
    color: var(--we-text-primary);
    border: 2px solid var(--we-border);
}

.we-btn--outline:hover {
    border-color: var(--we-accent-primary);
    color: var(--we-accent-primary);
    background: #f8fafc;
}

.we-btn--small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: var(--we-accent-primary);
    color: #ffffff;
}

/* Tertiary (ghost) button */
.we-btn--tertiary {
    background: transparent;
    color: var(--we-text-secondary);
    border: none;
    padding: 0.875rem 1.25rem;
}

.we-btn--tertiary:hover {
    color: var(--we-accent-primary);
    text-decoration: underline;
}

/* ========== Hero Section ========== */

.we-hero {
    min-height: 55vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #fdf8f3 0%, #f5efe8 100%);
    padding: 100px 0;
}

.we-hero__content {
    max-width: 640px;
}

.we-hero__title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--we-text-primary);
    margin: 0 0 1rem;
    letter-spacing: -0.03em;
}

.we-hero__subtitle {
    font-size: 1.1875rem;
    line-height: 1.65;
    color: var(--we-text-secondary);
    margin: 0 0 2rem;
    max-width: 560px;
}

.we-hero__buttons {
    display: flex;
    gap: 0.875rem;
    flex-wrap: wrap;
    align-items: center;
}

@media (max-width: 768px) {
    .we-hero {
        text-align: center;
        padding: 60px 0;
    }

    .we-hero__content {
        max-width: 100%;
    }

    .we-hero__title {
        font-size: 2rem;
    }

    .we-hero__subtitle {
        font-size: 1.125rem;
    }

    .we-hero__buttons {
        justify-content: center;
    }

    .we-hero__buttons .we-btn {
        width: 100%;
    }
}

/* ========== Topics Grid Section ========== */

.we-topics-grid-section {
    background: var(--we-bg-white);
}

/* ========== Card Styles ========== */

.we-card {
    display: block;
    background: var(--we-bg-white);
    border-radius: var(--we-card-radius);
    border: 2px solid var(--we-border);
    text-decoration: none;
    transition: all 0.3s ease;
    overflow: hidden;
}

.we-card:hover {
    border-color: var(--we-accent-primary);
    box-shadow: var(--we-card-shadow-hover);
    transform: translateY(-4px);
}

/* Category Card */
.we-category-card {
    padding: 1.75rem 1.5rem;
    position: relative;
}

.we-category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--we-accent-primary), var(--we-accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.we-category-card:hover::before {
    transform: scaleX(1);
}

.we-category-card .we-card__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--we-text-primary);
    margin: 0 0 0.5rem;
}

.we-category-card .we-card__desc {
    font-size: 0.9375rem;
    color: var(--we-text-secondary);
    margin: 0 0 0.75rem;
    line-height: 1.6;
}

.we-category-card .we-card__arrow {
    font-size: 1.25rem;
    color: var(--we-text-muted);
    transition: color 0.2s, transform 0.2s;
}

.we-category-card:hover .we-card__arrow {
    color: var(--we-accent-primary);
    transform: translateX(4px);
}

.we-category-card:hover .we-card__title {
    color: var(--we-accent-primary);
}

/* Topic Card (Featured) */
.we-topic-card {
    display: flex;
    flex-direction: column;
}

.we-topic-card .we-card__image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.we-topic-card .we-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.we-topic-card:hover .we-card__image img {
    transform: scale(1.05);
}

.we-topic-card .we-card__body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.we-topic-card .we-card__meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.we-topic-card .we-card__category {
    font-size: 0.8125rem;
    color: var(--we-text-muted);
}

.we-topic-card .we-card__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--we-text-primary);
    margin: 0 0 0.5rem;
    line-height: 1.4;
}

.we-topic-card .we-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.we-topic-card .we-card__title a:hover,
.we-topic-card:hover .we-card__title a {
    color: var(--we-accent-primary);
}

.we-topic-card .we-card__excerpt {
    font-size: 0.9375rem;
    color: var(--we-text-secondary);
    line-height: 1.6;
    margin: 0;
    flex: 1;
}

/* Level Badges */
.we-level-badges {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.we-level-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 999px;
    border: 2px solid;
}

.we-level-a1 {
    background: var(--we-level-a1-bg);
    border-color: var(--we-level-a1);
    color: #047857;
}

.we-level-a2 {
    background: var(--we-level-a2-bg);
    border-color: var(--we-level-a2);
    color: #b45309;
}

.we-level-b1 {
    background: var(--we-level-b1-bg);
    border-color: var(--we-level-b1);
    color: #1d4ed8;
}

.we-level-b2 {
    background: var(--we-level-b2-bg);
    border-color: var(--we-level-b2);
    color: #6d28d9;
}

/* Small badge variant for Featured Topics */
.we-level-badge--sm {
    padding: 0.125rem 0.5rem;
    font-size: 0.6875rem;
    border-width: 1.5px;
}

.we-level-badges--small {
    gap: 0.25rem;
}

/* Clickable level badge links */
.we-level-badge--link {
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.we-level-badge--link:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Book Card */
.we-book-card {
    text-align: center;
}

.we-book-card .we-card__cover {
    padding: 1.5rem 1.5rem 0;
}

.we-book-card .we-card__cover img {
    width: 100%;
    max-width: 180px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.we-book-card .we-card__body {
    padding: 1.25rem 1.5rem 1.5rem;
}

.we-book-card .we-card__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--we-text-primary);
    margin: 0 0 0.375rem;
}

.we-book-card .we-card__author {
    font-size: 0.9375rem;
    color: var(--we-text-secondary);
    margin: 0 0 0.5rem;
}

.we-book-card .we-card__levels {
    display: block;
    font-size: 0.8125rem;
    color: var(--we-text-muted);
    margin-bottom: 1rem;
}

/* ========== Great Books Section ========== */

.we-great-books {
    background: linear-gradient(135deg, #fefcfb 0%, #f8f4ef 100%);
}

/* ========== About Section ========== */

.we-about {
    padding: var(--we-section-padding) 0;
}

.we-about__card {
    background: var(--we-bg-white);
    border-radius: var(--we-card-radius);
    padding: 3rem;
    text-align: center;
    box-shadow: var(--we-card-shadow);
    border: 1px solid var(--we-border);
}

.we-about__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--we-text-primary);
    margin: 0 0 1.5rem;
}

.we-about__content {
    margin-bottom: 2rem;
}

.we-about__content p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--we-text-secondary);
    margin: 0 0 0.75rem;
}

.we-about__content p:last-child {
    margin-bottom: 0;
}

/* ========== Newsletter Section ========== */

.we-newsletter {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: #ffffff;
}

.we-newsletter__inner {
    text-align: center;
    padding: 2rem 0;
}

.we-newsletter__title {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    color: #ffffff;
}

.we-newsletter__subtitle {
    font-size: 1.0625rem;
    color: #94a3b8;
    margin: 0 0 2rem;
}

.we-newsletter__form {
    max-width: 480px;
    margin: 0 auto;
}

.we-newsletter__field {
    display: flex;
    gap: 0.75rem;
}

.we-input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    border: 2px solid #475569;
    background: #1e293b;
    color: #ffffff;
    border-radius: 12px;
    outline: none;
    transition: border-color 0.2s;
}

.we-input::placeholder {
    color: #64748b;
}

.we-input:focus {
    border-color: var(--we-accent-primary);
}

.we-newsletter__note {
    font-size: 0.8125rem;
    color: #64748b;
    margin: 1rem 0 0;
}

@media (max-width: 640px) {
    .we-newsletter__field {
        flex-direction: column;
    }

    .we-newsletter__field .we-btn {
        width: 100%;
    }
}

/* ========== Responsive Adjustments ========== */

@media (max-width: 768px) {
    :root {
        --we-section-padding: 48px;
    }

    .we-section__title {
        font-size: 1.5rem;
    }

    .we-section__subtitle {
        font-size: 1rem;
    }

    .we-about__card {
        padding: 2rem 1.5rem;
    }

    .we-about__title {
        font-size: 1.5rem;
    }
}

/* ========== Category Colors (Home) ========== */

/* Category card color bar on hover */
.we-category-card {
    --cat-color: var(--we-accent-primary);
}

.we-category-card::before {
    background: var(--cat-color);
    transform: scaleX(1);
    opacity: 0.6;
}

.we-category-card:hover::before {
    opacity: 1;
}

.we-cat-great-lives-people {
    --cat-color: #ca8a04;
}

.we-cat-health-better-living {
    --cat-color: #dc2626;
}

.we-cat-history-civilization {
    --cat-color: #78716c;
}

.we-cat-mind-psychology {
    --cat-color: #7c3aed;
}

.we-cat-money-modern-work {
    --cat-color: #ea580c;
}

.we-cat-science-nature {
    --cat-color: #16a34a;
}

.we-cat-stories-life-wisdom {
    --cat-color: #0284c7;
}

.we-cat-technology-future {
    --cat-color: #0891b2;
}

.we-cat-world-global-society {
    --cat-color: #2563eb;
}

/* Featured Topics - Card color bar */
.we-topic-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--cat-color, var(--we-accent-primary));
    border-radius: var(--we-card-radius) 0 0 var(--we-card-radius);
}

.we-topic-card {
    position: relative;
}

/* Featured Topics - Excerpt clamp for consistent card heights */
.we-topic-card .we-card__excerpt {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-clamp: 3;
}

/* Featured Topics - Category text color */
.we-topic-card.we-cat-great-lives-people .we-card__category {
    color: #ca8a04;
}

.we-topic-card.we-cat-health-better-living .we-card__category {
    color: #dc2626;
}

.we-topic-card.we-cat-history-civilization .we-card__category {
    color: #78716c;
}

.we-topic-card.we-cat-mind-psychology .we-card__category {
    color: #7c3aed;
}

.we-topic-card.we-cat-money-modern-work .we-card__category {
    color: #ea580c;
}

.we-topic-card.we-cat-science-nature .we-card__category {
    color: #16a34a;
}

.we-topic-card.we-cat-stories-life-wisdom .we-card__category {
    color: #0284c7;
}

.we-topic-card.we-cat-technology-future .we-card__category {
    color: #0891b2;
}

.we-topic-card.we-cat-world-global-society .we-card__category {
    color: #2563eb;
}

/* ========== Section Spacing Adjustments ========== */

/* About section - more space from Featured Topics */
.we-about {
    margin-top: 24px;
}

/* Featured Topics section - subtle background */
.we-featured-topics {
    background: #fcfbf9;
}